地球学报2018，Vol.39Issue(1)：79-93,15.DOI:10.3975/cagsb.2017.112501
甘肃省合作市早子沟金矿床构造应力场分析
An Analysis of the Tectonic Stress Field in the Zaozigou Gold Deposit, Hezuo Area, Gansu Province
摘要
Abstract
Located in western Qinling Mountain, the Zaozigou gold deposit in Hezuo City of Gansu Province is one of the recently discovered large-reserves deposits. Orebodies are mostly hosted in fault zones, showing that the mineralization was tightly controlled by fault activities, and the research on ore-controlling structures can provide scientific guidance for ore-prospecting in the mining area. Joints and scratch lineations in the deposit were detailed measured in the field in order to identify the principal stress direction by traditional and modern methods of tectonic stress field and to divide the stage and time of the tectonic stress field by the tectonic superposition, conjugating relation and diagenetic ages of magmatic rock and mineralization. The tectonic stress field in the Zaozigou area can be divided into three stages and five periods. Basement rocks were deformed, regional deformation occurred and magma emplacement took placed before the mineralization. The main mineralization stages could be divided into two periods. Orebodies were locally dislocated by fault activities after the metallogenesis. The relationship between tectonic activities and mineralization characteristics were further discussed, and the results suggest that the evolution of the tectonic stress field was consistent with the mineralization. In addition, favorable structural ore-forming areas in the depth are further pointed out.关键词
甘肃省/早子沟金矿床/构造应力场/控矿构造/找矿预测Key words
Gansu Province/Zaozigou gold deposit/tectonic stress field/ore-controlling structure/ore prognosis分类
天文与地球科学引用本文复制引用
韦良喜,陈正乐,庞振山,韩凤彬,肖昌浩..甘肃省合作市早子沟金矿床构造应力场分析[J].地球学报,2018,39(1):79-93,15.基金项目
本文由中国地质调查局地质调查项目(编号:1212011220936 （）
12120114032401)、国土资源部公益行业科研专项(编号:201411024-3)和自然科学基金联合重点基金(编号:U1403292)联合资助.This study was supported by China Geological Survey(Nos.1212011220936 and 12120114032401),the Special Scientific Research Fund of Public Welfare Profession of Ministry of Land and Resources of the People's Republic of China(No.201411024-3),and National Natural Science Foundation of China(No.U1403292). （编号:201411024-3）
